聚酰亚胺膜溶剂体系的筛选及其作用  

Selection and role of solvent system for polyamide membrane

作　　者：徐强强[1] 张鹏霞[2] 孙本惠[1] 陈翠仙[3] 李继定[3] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京蓝景膜技术工程有限公司,北京100084 [3]清华大学化学工程系膜技术工程研究中心,北京100084

出　　处：《膜科学与技术》2009年第2期47-50,共4页Membrane Science and Technology

基　　金：国家“973”项目(2003CB615701);国家自然科学基金(20576059,20676067,20736003);中石化科技开发研究基金(X505002);中石油风险创新基金(05051143)

摘　　要：采用一种新型的可溶性聚酰亚胺ODPA-BAPP为膜材料,分别用溶度参数法和黏度法对溶剂进行了筛选,然后选定N-甲基吡咯烷酮(NMP)作为溶剂,分别采用挥发性强的四氢呋喃、丙酮、乙醚作为第二溶剂(共溶剂),讨论了它们对成膜过程中的凝胶速率及形成的膜表面形貌的影响.实验结果表明:(1)NMP对ODPA-BAPP的溶解性最好;(2)第二溶剂的挥发性能越好,浇铸膜时的凝胶速率就越慢,就越利于形成表面致密结构的膜.The polyamide membranes were prepared by using a novel ODPB-BAPP condensation polymer as the membrane material. N-methyl pyrrolidone was selected as the major solvent depending on the data of both,sol, ubility parameter and casting solution viscosity. The volatile solvents, such as tetrahydrofuan, acetone and ether, were added respectively in the coating solution as the co-solvents. The results showed that N - methyl pyrrolidone has the best solvation on polyimide, and the volatile solvent can decrease gelation rate owing to the formation of dense membrane surface.

关 键 词：聚酰亚胺膜 溶剂 共溶剂 凝胶速率 膜结构 

分 类 号：TQ028.8[化学工程]